Can you tell me if Clean Retina has been tested and is compatible with WordPress 5.1? I notice the last update of the theme was two years ago. Thank you.
Yes it has been tested and works fine with WP 5.1.
If you got any problem do not hesitate to contact us.
I want to install this theme on my site, can anyone help?
You can simply go through instruction/documentation page to get help install this theme.